Air purifier filters, before and after

I just changed the filters on the Philips AC3829/60 series air purifiers in the bedrooms.

This is what the old filter looks like after 5000 hours of operation, which is almost a year considering that the air purifiers are not permanently on. I specially put it next to the new filter to better see the difference.

This is the air we breathe in Bucharest, Romania!

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